If you have a 3050-level graphics card or higher you can use RTX upscaling to improve the image, from the browser. 1080p content improves a lot if the base bitrate is okay, but dogshit 700mb/hr rips are always going to look bad.
Also worth installing a decent SEO plugin, like seopress, rank math or AIOSEO. Not yoast. That way you can manually tweak a lot of seo related stuff to ensure metadata is preserved.
I have a 1660 from my old machine and it seems to handle transcoding multiple 4K streams easily. Pretty low power draw as well, I doubt there’s much need for anything more powerful unless your files are in av1 or something.
If you have a 3050-level graphics card or higher you can use RTX upscaling to improve the image, from the browser. 1080p content improves a lot if the base bitrate is okay, but dogshit 700mb/hr rips are always going to look bad.